I'm not a Gumtree user. But if anything is like Ebay but potentially not as draconian as they are, it is open for scammers. I'd stick with this site and Ebay. Or try to trade in with some decent stores - I've sold to Press Start Games, they are very good.

Just so happens that I have an NTSC-U console spare(Just console). I got it for nothing and am willing to let you have it for just the price of postage. you can use the UK power supply quite safely too. Not sure about av lead though.

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